Bin gate



BIN GATE.

FILED AUG. 5. 192.0.

R.,W. STEWART.

" W1 ryxssrss: WMIINVENTOR.

1 p nniran STATE A T fi Patented Jan. 9, 1923.

RALPH STEWART, or nos anennns, fcarironnra.

em GATE.

Application filed Au ust 5, 1 920. ,seria No. 401,433.

To all 10710771412 may couce'm: a Be it known tliatI, RALPH W M. STEWART, a citizen oi the UnitedStatesyresiding at Los Angeles, in the county 0mm Angeles and State of California, haie in'l 'entcd' a new and useful Bin Gate, of which the following is a specification. I My invention relates to improvements in gateshy which the material stored in bins or reservoirs is retained and released by means of a closure membeim The closure member of this class of gates commonly has an arcuate surface usually called a quadrant which revolves about orw'ith a shaft the shaft occupying 5 a position on the concave side ot the quadrant along or near.

the centerot curvature of same, the material in the bin or reservoir, when retained, re? posing against the convex face ofthe quad rant. l

Gates of this type arein common use'at outlets in the sides of sand or gravel bins. When so used they are commonly known as quadrant bin gates. Two requisites of a gate oi this type when used with gram ular material a that it may bereadily opened when a mass of material having-a high co-el'licient of friction is pressing heavily against lt and thatit may be closed while material is flowing from the opening in the bin which it serves. If the material liquid or semi-liquid it is desirable that the gate should close tightly against the opening which t serves sothatleakage will be prevented.

I have therefore devised a gate having a closure member which rotates about shafts the wall of a bin together with a dischar e chute leading: from the opening in the bin wall served by the gate. Fig. 2 is an end elevation of the gate in clos-red' position with its mechanism set for easy openinq. is an end elevation of the gate in closed position.

the gate will not be hiddenfrom view.

Referring particularly to Fig. 1 A represents the arcuate face member of the ate, B the arms attached thereto Ca shaft having a fixed center of rotation, D arms which extend from shaft C to shaft E. By

means of arms D shaft E is caused to revolveabout shaft C, when shaftj is 1'0- tated. F and Fare cam levers rotating on shaft C; for conveniencethey are connected at their outer ends by hai- L. i .8 represents the chute usually provided to control the direction of the flow of materiahreleased' by the gate. I and I are parts of the wall.

of the bin to which the gate is attached. Part of the chuteS and part of thebin wall are shown as cut away so that'a portion of l H represents a handle by means of which shaft C may be rotated. Qtlier means for rotating this shaft could be used.

Shaft E passes through arms fit which permits armsB" to rotate about it. Shaft C passes through a recess or opening in arms B, the recess or opening being larger than shaft C.

In Fig. 2 all letters appearing in Fig. 1

designate thG SaHIG members asin Fig.v 1.

For clearness the arms D; handle H, and portions of bin wall I and I are omitted. J represents the confined material in the bin reposing against the convex side of the arcuate face A of the gate. K represents a. projection from the side of arm B. In the position shown shaft C is in contact with the upper side or the recess in arm B,

through which it passes leaving a gap (l between shaft 0 and the side of the recess in arm B which is toward the bottom of the material J inthe bin. F is shown rotated to a position which Also cam lever leaves a gap G hetwen it and projection K.

It now. shaft C is rotated in such a manner as to cause shaft E to move along: are m the face A of the gate will not C0111 nience torol'ate along are it until either gap (:l or gap G closes but members B will revolve with reference to shaft E in a direction opposite to the direction in which shaft revolves, and thatportion of the face oi gate A below the plane passed through the center lines o'lt' shafts (l and R will move away from the confined material .l which reposes against it. As soon as gap (ll or-(l closes the lace A. of the gate readily revolves upward along are n. the frictional .I'GSISUUICQ to such motion being greatly re B with a ill) duced by the movement of the face Aiof the gate away from material J before lift ing. After the gate opens by movement of its face A along arcn cam levers F drop,

by gravity or maybe lowered by hand until the pressure of cam levers F against projection K has caused arms B to rotate a suflicient distance about shaft E to bring arms B in contact with the top of shaft G thereby fully opening gap G, The gate will then close with its members in the position shown in Fig. 3 andlmay be easily reopened byfirst rotating cam, levers F to the positlon shown in Fig.2.

YVhen' the gate is used to confine liquid, semi-liquid, or soft compressible substances it maybe adjusted so that its face A may be brought to a vary firmbearing against the opening which it serves by, pressure exerted by cam lever Fonprojection K, thereby preventing leakage. 1 l

-Tl11S pressure can be released as above described in order to open the gate.

WhatI claim is: l i

1 In; a device of the class described, the combination of a wall having an opening therein, and a structure for controlling said gopening, said structure comprising aclosure member provided with rigid uarms mounted on two shafts in such a manner that it can rotate about one shaft av distance limited bythe constructionof the arms and about the other shaft a distance limited by the structure to which the device is attached. i

2..A bin gate having a closure member with arms rigidlyconnected to the same mounted on two axes, in such a manner that axis,

being-connected by arms other than the- ,arms .Of SfllCl closure member, the, arms of said closure member being so mounted on saidshafts that if, when the gate is in closed positiomit is opened by rotation of the shaft having afixed axis it will, before opening revolve a short distance with reference to the shaft having a moving axis.v A. bin gate comprising a closure member with' rigid arms, an axis mounted on said rigid arms. afixed axis upon which said ,arinsare' mounted, said closure member and its arms being so mounted on the two axes that if, when in closed position, the gatei s opened by rotation about the fixed axis, the

face of said closure member or a portion thereof, -will, before opening by rotation about said fixed axis move closer thereto.

,6 A bingate comprising in combination a fixed axis, a rcvoluble axis, means pivotally securing said revoluble axis to said fixed and a closure member pivotally mounted on said-revoluble axis and having means limiting its pivotal movement.

RALPH M. STEWART. 

